I posted a thread on here about comparing my Vibrant GPS to my DeLorme PN-40, but somehow it got deleted. The basic idea of the post was to try out the Vibrant for Geocaching, where your GPS needs to be accurate or you're never going to find the cache. I loaded up Geobeagle & GPS Status & headed for the mountains. The area I chose to hike was at 8000ft in a tree covered canyon. I had the use wireless networks feature turned off as there was limited coverage in the area. I planned to try and find two caches I'd found before using just the phone, so I could see how accurate it was.
At the trailhead I turned on the GPS on both devices. The phone found my position with no problem, though it reported a lock on only 1 satellite. Going back into the canyon, I got within about 15ft of one cache and 35ft of another. The Delorme got me within 5ft of the first cache and right on top of the second. Deep into the canyon, the phone lost the satellite and was unable to obtain a lock until I was back under open skies (this is not unusual for any GPS in this area... my old Garmin jumped about like crazy there). The DeLorme had no problems keeping a lock in this area... but it's a pretty high end device designed for backcountry use.
Here's the thing though. There is something wrong with the way the Vibrant is reporting satellite locks. It would be impossible to pinpoint your location with the one satellite my Vibrant was showing. GPS works by triangulating your position, using the distance the GPS unit is from each satellite to determine your position on the surface of the Earth. You need at the very least 3 satellite signals to get it to work. 4 will give you a "3-D" position with will also calculate the elevation at which you are standing. The Vibrant reported only one satellite lock, but if you need 3 or more to get any position at all, that tells me there is something definitely wrong in how it is reporting the satellite locks.
Comparing GPS results between the Vibrant and the DeLorme, the DeLorme performed better under the test conditions (as expected), but at 35ft margin of error in a wooded canyon on a mountain is certainly not bad for the phone. I wouldn't use it for geocaching, but it seems to work okay for basic navigation. I used it last week to find a bus route from my location to the airport and it got me there just fine. I also used it to find a nearby Starbucks, and once again, it worked. In my opinion, if your GPS seems to work, stop worrying about how many satellites it's showing and just use it. It will work well enough for everyday use until Samsung comes up with a proper fix.